- Dec 5, 2009
- Regina, Saskatchewan, Canada
There is one important thing to note, compared to some of the other "testing" we see. Now, Castrol states what test they are using in their comparison. You can go to the ASTM International site and purchase the methodology. If you have the equipment, you can run the test. If you don't, but do have some resources or know someone who does, you can rent, buy, or borrow the equipment. You can go to the store and buy any of these oils and conduct the tests and verify or disprove Castrol's claims. Now, I never said it was easy, or something you'd just finish off in an afternoon, but it can be done. And, you can be rest assured that Mobil (and everyone else) has conducted the same testing.
Originally Posted By: Ed_Flecko
I got a response from Castrol about their claims, and I can't say that I'm surprised. I asked them, "Your website says "Independent testing has proven EDGE Extended Performance stronger than Mobil 1 Extended Performance against viscosity breakdown – the ultimate test of strength." and "Castrol EDGE Extended Performance 5W-30 was proven stronger against viscosity breakdown based on ASTM 6278 and CEC-L-14 independent testing." Can you provide me with these test results?" Their reply... "Thank you for contacting Castrol North America. The information requested is not available as it is proprietary."